Tool locking system

ABSTRACT

A locking system for securing tools on an arbor. The locking system has a collar attached to the arbor, with the collar spaced from the tooling. A nut is placed over the collar and positioned next to the tools. The nut is then rotated to secure the nut between the collar and the tools.

BACKGROUND OF THE INVENTION

Tooling on roll forming and slitter arbors has traditionally been heldonto the arbor by using a threaded nut on the end of the arbor thatreceives the tooling. The threaded nut must have mating threads that aremachined into the end of each arbor. These threads on the arbor aresubject to damage as tooling is loaded onto the arbor, the nut isthreaded upon the arbor or removed from the arbor, or just by beingexposed in the work place. Damaged threads can require costlymaintenance to restore to a working condition. Therefore, there is aneed for a more robust system to hold tooling on arbors that does notrequire threads.

SUMMARY OF THE INVENTION

The present invention is an arbor tool locking system. The system uses aflanged nut that rotatably engages a keyed collar on the arbor. Thecollar forms a part of the arbor and is spaced from that part of thearbor that carries the tooling. The nut is slid over the collar andpartially rotated to cause the nut flanges to be positioned between thecollar and the tooling upon the arbor with the nut compressed againstthe tooling.

An object of the invention is to provide a locking mechanism to holdtooling on arbors without the use of screw threads.

Another object of the invention is to provide a locking mechanism fortooling of a roll former and slitter which can be economicallymaintained and of rapid operation.

Still other objects of the invention will become apparent upon readingthe following description.

BRIEF DESCRIPTION OF THE DRAWINGS

A preferred embodiment of this invention has been chosen wherein:

FIG. 1 is a perspective view of a slitter with tooling stacked andlocked on the arbors;

FIG. 2 is a fragmentary side view of an arbor end in partial sectionalform;

FIG. 3 is a perspective exploded view of the slitter tool lock;

FIG. 3A is a perspective view of the nut of the tool lock shown inassembled form;

FIG. 4 is a view of the end of an arbor with the nut installed in itsreleased position; and

FIG. 5 is a view of the end of an arbor with the nut installed in itslocked position rotated 45 degrees from the position shown in FIG. 4.

DETAILED DESCRIPTION OF INVENTION

The tool locking system of this invention includes a nut 10 and a collar11 forming a component of arbor 12. Arbor 12 is shown as forming a partof a slitter 5. The nut 10 has equally radially spaced flanges or bosses14 that protrude toward the inside of the nut as shown in FIG. 3A.Flanges 14 are inwardly spaced from outer edge face 15 of the nut. Nut10 has an annular groove 18 formed in its inner edge face 17 as shown inFIG. 3A. The annular groove 18 in the nut receives a pressure ring 22. Abore 23 extends in nut 10 into groove 18 behind ring 22. A grease zerkfitting 40 is located in bore 23 at face 15. Pressure ring 22 forms whatis also known in the trade as a Jetnut. A ball check valve 44 is alsolocated at face 15 in a bore 25 into groove 18. Collar 11 is attached toor forms an intregal part of arbor 12 and includes a plurality of equalradially spaced coplanar flanges 16 spaced just slightly more than thethickness of nut flanges 14 from shoulder 19 of the arbor 12.

The outer diameter of collar 11 at the ends 21 of the flanges 16 is lessthan the major diameter 26 of the arbor to allow tooling 30, in the formof cutters and spacers, to pass over the flanges 16 at the end of thearbor 12. This outer diameter of collar 11 is also less than the innerdiameter of nut inner surface 13.

Tooling 30 is stacked on the arbors 12, as shown in FIG. 1, until thearbors are full from the inner shoulder 34 to the outer shoulder 19 ofthe arbor. FIG. 2 shows a sectional view of a full arbor 12 near theopen end 36 of the arbor. Once the arbor 12 is full of tooling 30, thenut 10 is inserted upon the open end 36 of the arbor with the flanges 14on the nut 10 lining up with the spaces 38 between the flanges 16 on thearbor 12. The nut 10 is pushed onto the arbor end until pressure ring 22preferably abuts arbor shoulder 19. This position is shown in FIG. 4 andis the nut's unlocked position. The depth of flanges 14 are such thatthe flanges clear the root face 29 of collar 11 between flanges 16. Thenut 10 is then turned 45 degrees to its locked position, as show in FIG.5, so that the flanges 14 of the nut are then between the flanges 16 ofthe collar and shoulder 19 of the arbor 12. A hole 42 is provided in theside of the nut 10 in which a rod or spanner wrench may be inserted toassist in turning the nut 10. In the 45 degree rotated position shown inFIG. 5, a grease gun is then used to force grease into groove 18 of thenut through fitting 40. The pressurized grease causes the pressure ring22 to forcefully press against the tooling 30, thereby securing thetooling 30 in place on the arbor and locking the nut 10 against collar11. To unlock the nut 10, check valve 44 is open to release the pressureupon the grease in chamber 23 which causes pressure ring 22 to no longerforcefully push against the tooling 30. This allows nut 10 to be turnedinto its released position, as shown in FIG. 4, where it can be removedto free the tooling 40 for replacement.

The above described invention is not to be limited to the details givenbut may be modified within the scope of the following claims.

1. A locking system for securing tools on a metal forming machinecomprising: said arbor including a collar, said collar spaced from saidtooling; a nut, said nut slidable over said collar and positionedadjacent said tooling in a first position, said nut being shiftablerelative to said collar from said first position into a second positionoverlying said tools and secured between said collar and the tools.
 2. Alocking system as claimed in claim 1, wherein said nut is rotatablerelative to said collar between said first position and said secondposition.
 3. A locking system as claimed in claim 2, wherein said collarhas spaced flanges on said collar, said nut having spaced internalflanges, said internal flanges passing between said collar flanges assaid nut is slid over collar into its said first position said internalflanges on said nut between said tooling and said collar flanges hensaid nut is in its said second position located on said collar.
 4. Alocking system as claimed in claim 1, wherein said nut has a groove,said groove receiving said pressure ring to form a chamber within saidnut, said chamber receiving a pressure forming source to extend saidpressure ring apart for said tooling on said arbor when said nut is inits said second position.